Nissan Sentra B18 (2020-2025) Service Manual: Multi Av System

Nissan Sentra B18 (2020-2025) Service Manual / Driver Information & Multimedia / Audio, Visual & Navigation System :: Display Audio with 7" Color Display / Symptom Diagnosis / Multi Av System

Symptom Table

Symptom Table

RELATED TO AUDIO

Symptoms	Check items	Probable malfunction location
No sound comes out or the level of the sound is low.	No sound from all speakers.	Speaker circuit shorted to ground. Refer to Wiring Diagram. AV control unit power supply and ground circuits malfunction. Refer to Diagnosis Procedure.
No sound comes out or the level of the sound is low.	Only a certain speaker (front door speaker LH, front door speaker RH, rear speaker LH, rear speaker RH) does not output sound.	Poor connector connection of speaker. Sound signal circuit malfunction between AV control unit and speaker. Refer to: Diagnosis Procedure (front door speaker). Diagnosis Procedure (rear speaker). Malfunction in speaker. Refer to: Removal and Installation (front door speaker). Removal and Installation (rear speaker). Malfunction in AV control unit. Refer to On Board Diagnosis Function.
Noise is mixed with audio.	Noise comes out from all speakers.	Malfunction in AV control unit. Refer to On Board Diagnosis Function.
	Noise comes out only from a certain speaker (front door speaker LH, front door speaker RH, rear speaker LH, rear speaker RH).	Poor connector connection of speaker. Sound signal circuit malfunction between AV control unit and speaker. Refer to: Diagnosis Procedure (front door speaker). Diagnosis Procedure (rear speaker). Malfunction in speaker. Poor Installation of speaker (e.g. backlash and looseness). Refer to: Removal and Installation (front door speaker). Removal and Installation (rear speaker). Malfunction in AV control unit. Refer to On Board Diagnosis Function.
	Noise is mixed with radio only (when the Nissan Sentra vehicle hits a bump or while driving over bad roads)	Poor connector connection of antenna or antenna feeder. Refer to Antenna and Antenna Feeder.
No radio reception or poor reception.	Any radio station cannot be received or poor reception is caused even after moving to a service area with good reception (e.g. a place with clear view and no obstacles generating external noises).	Poor connector connection of antenna or antenna feeder. Refer to Antenna and Antenna Feeder.
Buzz/rattle sound from speaker	The majority of buzz/rattle sounds are not indicative of an issue with the speaker, usually something nearby the speaker is causing the buzz/rattle.	Refer to "SQUEAK AND RATTLE TROUBLE DIAGNOSIS" in the appropriate interior trim section.

RELATED TO HANDS-FREE PHONE

Before performing diagnosis, confirm that the cellular phone being used by the customer is compatible with the Nissan Sentra vehicle.
It is possible that a malfunction is occurring due to a version change of the phone even though the phone is a compatible type. This can be confirmed by changing the cellular phone to another compatible type, and check that it operates normally. It is important to determine whether the cause of the malfunction is the Nissan Sentra vehicle or the cellular phone.

Check Compatibility

Make sure the customer’s Bluetooth^® related concern is understood.
Verify the customer’s concern.
Note:
The customer’s phone may be required, depending upon their concern.
Write down the customer’s phone brand, model and service provider.
Note:
It is necessary to know the service provider. On occasion, a given phone may be on the approved list with one provider, but may not be on the approved list with other providers.
Go to “www.nissanusa.com/bluetooth/”.
1. Using the website’s search engine, find out if the customer’s phone is on the approved list.
2. If the customer’s phone is NOT on the approved list:
  
  Stop diagnosis here. The customer needs to obtain a Bluetooth^® phone that is on the approved list before any further action.
3. If the feature related to the customer’s concern shows as “N” (not compatible):
  
  Stop diagnosis here. If the customer still wants the feature to function, they will need to get an approved phone showing the feature as “Y” (compatible) in the “Basic Features”.
4. If the feature related to the customer’s concern shows as “Y” (compatible):
  
  Perform diagnosis as per the following table.

Symptoms	Check items	Probable malfunction location
Does not recognize cellular phone connection (no connection is displayed on the display screen).	Use Enhanced Multi-Media Interface Tester (EMMIT) NI-51922 to test Bluetooth^® functionality. Refer to the EMMIT user guide for additional information. Repeat the registration of cellular phone.	Customer’s phone Malfunction in AV control unit. Replace AV control unit. Refer to Removal and Installation.
Hands-free phone cannot be established.	Hands-free phone operation can be made, but the communication cannot be established. Hands-free phone operation can be performed, however, voice between each other cannot be heard during the conversation.	Malfunction in AV control unit. Replace AV control unit. Refer to Removal and Installation.
The other party’s voice cannot be heard by hands-free phone.	Check the “microphone speaker” in Inspection & Adjustment Mode if sound is heard.
Originating sound is not heard by the other party with hands-free phone communication.	Sound operation function is normal.
	Sound operation function does not work.	Microphone signal circuit malfunction. Refer to Diagnosis Procedure.
The system cannot be operated.	The voice recognition can be controlled. Steering switch’s , , and switch works, but does not work.	Steering switch malfunction. Replace steering switch. Refer to Removal and Installation.
	Steering switch’s , , , and switches do not work.	Steering switch signal circuit malfunction. Refer to Diagnosis Procedure.
	All steering switches do not work.	Steering switch ground circuit malfunction. Refer to Diagnosis Procedure.

RELATED TO USB

Symptoms	Check items	Probable malfunction location
iPod^® or USB memory cannot be recognized.	Use Enhanced Multi-Media Interface Tester (EMMIT) NI-51922 to test USB functionality. Refer to the EMMIT user guide for additional information.	iPod^® or USB memory USB harness malfunction. USB connector malfunction.

RELATED TO AUX JACK

Symptoms	Check items	Probable malfunction location
No voice sound is heard when AUX mode is selected.	Use Enhanced Multi-Media Interface Tester (EMMIT) NI-51922 to test AUX jack functionality. Refer to the EMMIT user guide for additional information.	Auxiliary device AUX sound signal circuit.

Normal Operating Condition

Description Description RELATED TO NOISE The majority of the audio concerns are the result of outside causes (bad CD, electromagnetic interference, etc.). The following noise results ...

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